Efficient lubrication system of engine cylinder heads of contravariant small-sized dual-cylinder generator set

Abstract

The invention discloses an efficient lubrication system of engine cylinder heads of a contravariant small-sized dual-cylinder generator set. Cylinder head mechanisms of a top cam-type dual-cylinder engine in the set are mainly improved. According to the improvement core, the efficient lubrication system is characterized in that an oil injection pump is arranged in a crankshaft box, an oil inlet ofthe air injection pump is soaked in an engine oil pool of the bottom of the box, oil outlets are connected with cylinder head oil inlets formed in cylinder head cavities of the two sides through pipes and distribution valves separately, a concave cavity is formed in the portion, below a cam, in each cylinder head cavity and used as a cam engine oil pool which is used for storing engine oil flowing into the cavities, and the engine oil is thrown to an air door rocker mechanism through cam rotation; cylinder head oil outlets are further formed in the cylinder head cavities and connected with oil return holes formed in the crankshaft box through oil return pipes. According to the efficient lubrication system, internal mechanisms of cylinder heads are more efficiently lubricated, the structural design of the cylinder heads is conveniently simplified, and heat dissipation is even.

Description

technical field [0001] The invention relates to an engine cylinder head high-efficiency lubricating system of an inverter small double-cylinder generator set. Background technique [0002] The output frequency of the traditional generator set is synchronous with the speed of the engine, while the inverter generator set rectifies the alternating current generated by the generator into direct current, and then converts it into the required frequency alternating current (usually 50HZ and 60HZ), so the engine speed does not need to be synchronized with the output voltage. From the natural working state of the engine, it can be known that the engine with a smaller single-cylinder displacement has a higher optimal torque point. The best torque point for a 100CC engine is around 4000 rpm, for a 200cc engine around 3500 rpm, and for a 400CC engine around 2500 rpm. We know that the power of an engine is the rotational speed multiplied by the torque. If an engine of about 50CC is use...

AI Technical Summary

Problems solved by technology

[0005] As we all know, the known generator set is based on the design consideration of light weight and simplified structure, and the lubrication of its internal engine usually adopts splash lubrication, but the disadvantage is that the lubrication effect is often poor, especially for the engine with overhead cam, from The engine oil thrown out by the crankshaft in the crankcase often does not reach the various parts on the cylinder head, and there is a problem of insufficient lubrication

On the other hand, the existing lubrication systems are often designed based on the original tappet drive mechanism, and the structure is complex. For example, oil return holes need to be designed on the tappet, which affects the roundness and sealing performance of the cylinder head.

[0006] In addition, as the engine speed increases, the resistance generated by crankshaft throwing oil becomes larger and larger, resulting in greater power loss

At the same time, crankshaft oil throwing will also make the engine oil age early, and it is easy to mix air bubbles into the engine oil

Therefore, the lubrication system of the existing small twin-cylinder generator set is not suitable for its development, and we need to find a more efficient, reasonable and reliable lubrication system

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